FIELD: oil and gas industry.
SUBSTANCE: method for obtaining anisotropic petroleum pitch involves heat treatment of isotropic petroleum pitch in inert atmosphere at increased temperature of 350-450°C during 5-20 hours, pressure of 10-100 mm Hg, further extraction treatment of the obtained product with quinolone, distillation of extraction agent and treatment of the obtained anisotropic pitch in an ultrasonic field for removal of solvent traces.
EFFECT: invention allows improving quality of target anisotropic pitch owing to increasing content of mesophase in it, which is uniformly distributed throughout pitch volume and obtaining high-modulus carbon fibres based on it.
1 dwg, 2 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD TO PRODUCE ANISOTROPIC FIBRE-FORMING OIL PITCH BY EXTRACTION OF AROMATIC AND HETEROCYCLIC COMPOUNDS | 2012 |
|
RU2480509C1 |
| METHOD FOR OBTAINING ANISOTROPIC FIBRE-FORMING PETROLEUM PITCH BY TOLUENE EXTRACTION UNDER SUPERCRITICAL CONDITIONS | 2012 |
|
RU2502782C2 |
| METHOD OF PRODUCTION OF ANISOTROPIC OIL FIBRE-FORMING COAL TAR | 2014 |
|
RU2563280C1 |
| METHOD OF OBTAINING ANISOTROPIC PETROLEUM PITCH | 2017 |
|
RU2668870C1 |
| METHOD FOR OBTAINING ANISOTROPIC PETROLEUM PITCH | 2017 |
|
RU2668444C1 |
| METHOD FOR PRODUCING MESOPHASE PITCH (VERSIONS) | 2016 |
|
RU2708848C1 |
| METHOD FOR OBTAINING OIL PITCHES | 2011 |
|
RU2477744C1 |
| METHOD OF MAKING ARTICLES FROM CARBON-CARBON COMPOSITE MATERIAL | 2019 |
|
RU2734685C1 |
| METHOD OF PRODUCING PETROLEUM ISOTROPIC FIBER-FORMING PITCH | 1994 |
|
RU2065470C1 |
| PETROLEUM PITCH OBTAINING METHOD | 2011 |
|
RU2478685C1 |
